Which of the following is the most efficient means of beam restriction?
collimator
wedge filter
aperture diaphragm
extension cone
collimator
Rationale: The collimators are placed close to the tube port to control the amount of off-focus radiation leaving the tube.
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Glycine and GABA are classified as
a. Excitatory neurotransmitters b. Inhibitory transmitters c. Glycine is excitatory and GABA is inhibitory d. GABA is excitatory and glycine is inhibitory
Physicians who specialize in the ear are known as all of the following EXCEPT ________
a. otologists b. orthodontists c. otorhinolaryngologists d. ENT (ear, nose, and throat) doctors
You have arrived at the scene of a medical emergency. As you enter the room where the patient is located, you note him to be sitting up and talking without difficulty. Emergency Medical Responders are on scene and providing basic care for the patient. Which one of the following will you do first?
A) Place the patient on your stretcher and transfer him to the ambulance. B) Ask the patient's family if he has any past medical problems. C) Get the patient's pulse and respiratory rate, along with his blood pressure. D) Get a report from the Emergency Medical Responder.
Blood is composed of plasma and formed elements
Indicate whether the statement is true or false